During the past few years, interest in high-frequency price data has grown steadily. Recent major economic events - including the food crisis and the energy price surge – have increased the need for timely high-frequency data, openly available to all users. Standard survey methods lag behind in meeting this demand, due to the high cost of collecting detailed sub-national data, the time delay usually associated with publishing the results, and the limitations to publishing detailed data. For example, although national consumer price indices (CPIs) are published on a monthly basis in most countries, national statistical offices do not release the underlying price data.

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